Hot Hot Hot

I think my Mac was killed... should be seriously hurt by such high temperature, it freeze occasionally. Once the "beach ball" comes up, I need to force it to shutdown, afterward, it won't boot again and even cannot detect the hard drive. However, after taking tens of minutes of rest, it works again. DAMN! this make the machine unreliable, especially with unsaved work.
Just collected back to the service centre for further diagnostics. DAMN!